The Design of Active Crossovers is a guide to the design of high-quality circuitry, for splitting audio frequencies into separate bands and directing them to different loudspeaker drive units. Very sophisticated filtering and response-shaping networks can be built at comparatively low cost. Time-delay networks that compensate for physical misalignments in speaker construction can be implemented easily; the equivalent in a passive crossover is impractical because of the large cost and the heavy signal losses. Active crossover technology is also directly applicable to other band-splitting signal-processing devices such as multi-band compressors.
Virtually every page in this book reveals some nuggets of specialized knowledge never before published. Essential points of theory bearing on practical performance are lucidly and thoroughly explained, with the mathematics kept to an essential minimum.
Chapter 2: How Loudspeakers Work
Chapter 3: Crossover Requirements
Chapter 4: Crossover Types
Chapter 5: Notch Crossovers
Chapter 6: Subtractive Crossovers
Chapter 7: Lowpass & Highpass Filter Characteristics
Chapter 8: Designing Lowpass & Highpass Filters
Chapter 9: Bandpass & Notch Filters
Chapter 10: Time Domain Filters
Chapter 11: Equalisation
Chapter 12: Passive Components for Active Crossovers
Chapter 13: Opamps for Active Crossovers
Chapter 14: Active Crossover System Design
Chapter 15: Subwoofer Crossover
Chapter 16: Line Inputs and Outputs
Chapter 17: Line Outputs
Chapter 18: Power Supply Design
Chapter 19: An Active Crossover Design
Appendix 1: Crossover Design Reference
Appendix 2: Loudspeaker Design Reference